AboutDan Merrill Expertise We are a "green" roofing company. We offer information and advice on metal and synthetic cedar, tile, and slate roofing products.
We also address good, sound installation practices for lifetime and slate roof installations.
Generally speaking, we are experienced with any materials that have 50 year or longer, expected lifespan, such as copper, terne coated steels, Kynar painted Steel, Aluminum, etc.
We do extensive Infrared scans of homes with water leaks, moisture damage, air leakage, etc. So we have a good practical knowledge of what works and what does not work in the long term.
We offer no advice on asphalt or fiberglass roofing products.
Experience Was a hobbyist/home remodeler for over 30 years. Restored over 30 homes.
After retiring from engineering (27 years), I studied materials and installation practices of high-end roofing materials. This information was tempered by my engineering experience.
We have developed and sell roofing "kits" to roofing contractors who do not have the time to research rarely used roofing products. We ensure that they have all the required materials, tools and information to offer their customers a solid 50 year installation.
Organizations National Association of Home Builders
Fox Valley Builders Assoc.
Illinois Association of Home Builders
Remodelers Council of NAHB
Metal Roofing Alliance
EnergyStar provider
U.S. Green Builder Council
Better Business Bureau
Publications Our websites www.ecowiseinc.com and www.chicagometalroofing.com,
Fox Tails, publication of the Fox Valley Builders Association
Education/Credentials Tech certificate in Mechanical Drafting, 1978.
Self-taught Engineer.
Many certificates held.
Have achieved NAHB "Certified Graduate Remodeler" designation.
Graduate of Green Builder College.
Licensed, insured & Bonded Roofer in Illinois.
Awards and Honors Holder of many Patents,
Member of Mensa
Question I have an electric attic roof fan that when running appears to pull air out of the house. The house has a gambrel roof. There are no soffit vents with this house and the gable end vents are the old style with only slits in the aluminum siding.
I also have three 12X12 inch roof can vents.
I am assuming I need to add some some additional ventilation but I am not sure what is the best way to go or how much I will need.
Any help is appreciated
Answer If you are replacing your roof I would recommend products from DCI products or TrimLIne. They both offer drip edge venting. You cut an area out of the roof deck (plywood) that is about ¾” wide and install the vent over it. The vent allows intake air to be drawn in from the lowest accessible area of the roof. This is real handy when you have a roof without Soffit venting and without access to install soffit venting. This venting should be installed the full length of the eaves.
When you have an attic system without lower intake venting, there will always be problems. Air will always take the path of least resistance. So when you have a combination of Gable vents and a powered attic vent, the Gable vents will be the intake. This will reduce some of the heat in summer, but not a lot. The biggest issue is that this combination of vents will help very little in winter. The air can’t flow under the roof areas that need it the most.
Some old homes just can’t be ventilated enough to function well with our modern lifestyle changes. The volume of moisture released by an average family is many, many times what these homes were designed to tolerate. A hundred years the norm was one bath a week. And family members commonly used the same bath water. Homes had no insulation at all so the moisture could easily escape.
Today’s families release maybe 10 times to 20 times the moisture as compared to 100 years ago.
The best solution we have seen for many of these old homes is the newer building code allowance of “conditioned attic space”. This idea is to spray closed-cell urethane foam on the underside of the roof deck (plywood) for insulation. This foam is a vapor and air barrier. Several inches of this material will prevent moist air from getting anywhere near cold surfaces so there is no problem with condensation.
This also keeps insulation away from problem areas like the remnants of old knob & tube wiring that can be a fire hazard if covered with insulation.
Retrofitting this insulation isn’t cheap but it is amazing how much it can improve an old homes comfort. The payback from reduced utilities costs is commonly 5-7 years in our experience.
Good luck,
Dan
